1. Transfusion Medicine Unit; Komfo Anokye Teaching Hospital; Kumasi Ghana
2. Faculty of Health and Life Sciences; Liverpool School of Tropical Medicine; Liverpool UK
3. School of Public Health; School of Medical Sciences, Kwame Nkrumah University of Science and Technology; Kumasi Ghana
4. Kumasi Centre for Collaborative Research; Kwame Nkrumah University of Science and Technology; Kumasi Ghana
5. Department of Public Health; University of Copenhagen; Copenhagen Denmark
6. Department of Clinical Microbiology Kumasi; Kwame Nkrumah University of Science and Technology; Kumasi Ghana
7. Department of Clinical Immunology; Copenhagen University Hospital; Copenhagen Denmark